Door locking mechanism



June 9, 1936. w. MUMBRAUER ET AL DooR LOCKING MECHANISM.

2 sheets-sheet 1 Filed May 51, 1935 III y IIIIIII 9,1936. w. MUMBRAUl-:E-r AL 'DOOR LOCKING MECHANSM Filed May 3l, 1935 2 Sheets-Sheet, 2

Patented June 9, 1936 UNITED STATES Doon LOCKING MECHNISM William Mumbrauer and Adolf zum New York, N. Y.

`Felde,

Application May 31, 1935, lSerial No..24,194

2 Claims.

This invention relates to improvements in door latches and closers, and it is the principal object of our invention to provide a door, preferably a folding-door, with two, spring-controlled, lever operated, rotatable upper and lower latches which will automaticallyoperate to hold the wings of the door closed and locked, if so desired, while the lower of the latches will automatically engage a socket in the floor when the wings of the door are swung about their hinges into door opening position for locking the wings in this position.

Another object of our invention is` the provision of door latches or closers, each of which has a preferably cylindrical casing or housing in which the locking members proper consisting of spherical or semi-spherical bodies are held to partly project from their housingto engage suit able sockets in the door sill or upper frame bar or in the floor under spring pressure to be dogged or undogged by the proper operation of a lever.

A further object of our invention is the provision of latches or locking members for doors including cylindrical housings which cachenclose two movable locking members interlocking and rotatably held in said housings and which are spring controlled and adapted to be operated by means of a lever extending to the outside of the housings for interlocking or disengaging the two members to either dog the spherical locking bodies in their socket engaging positions, or to allow their recession into the housing to allow the swinging of the door wings about their hinges.

A still further objectof our invention is the provision of a door closer and latch of a comparatively simple and therefore inexpensive construction, yet durable and highly eii'icient in operation and including means for additionally safeguarding their operation.

'Ihese and other objects and advantages of our invention will become more fully apparent as the description thereof proceeds, and will then be speciiically dened in the appended claims.

In4 the accompanying drawings forming a material part of this disclosure:

Fig. l is a fragmentary front elevation of one wing of a folding-door equipped with a pair of closers or latches constructed according to our invention.

Fig. 2 is a fragmentary top plan view of a floor provided with a ydoor stop socket, with the door in section on line 2--2 of Figure 1.

Fig. 3 is a vertical section through one of the latches constructed according to our invention embedded in the material of a door, the door and sill shown fragmentarily.

Fig. 4 is a view `similar to Figure 3 at an angle of thereto. Y

Fig. `5 is a section on line 5--5 of Figure 3.

Fig. 6 is a section on line 6--6 of Figure 3.

Fig. 'I is a sectional detail view of one of the latches.

As illustrated, the wing Ill of a door adapted to be swung about its customary hinges II and equipped with the conventional locks I2 and knob I3, has embedded in its material at the upper andlower portion of the inner frame bar I4 the latch casings I5, I6, preferably cylindrical inform and enclosing the locking members and their operating parts.

Each of the casings I5, I6 has its material at the outer end slitted, as at II, and inwardly bent, as indicated at I8, to enclose and hold a locking member I9 either as shown of spherical shape or ofhemi-spherical'shape and partly projecting from'the outer end `o1 the cylindrical casing to engage either a socket 20 provided in the door sill 2I, or a socket 22, provided in the upper bar of the door frame.

The inner edge of the door wing Ill has provided in its frame bar I4 two sockets 23 and 24. a lower and an upper one, into which extend the pins 24 and 25 respectively with their threaded tenons 26 through slots 21 in the casings I5, I 6 into a member or head 23, slidably arranged within the cylindrical casing I5 and having formed at its lower reduced end a plurality of downwardly extending lips or tongues 29 spaced from one another about the outer circumference of the reduced end of member 28 and adapted to engage suitably formed recesses 30 in the inner marginal edge of a second sleeve member 3l held in the housing I5 by means of an inner stud 32 guided in a longitudinally extending groove 33 of member 3l.

The sleeve member 3l contains a spring 34 engaging with its inner end the outer reduced end of member 28 and with its outer end the bottom part of sleeve 3|.

Near its upper end, the head of member 28 has formed therein a chamber 35 in which a spring 36 is located frictionally engaging with its outer end in an opening 31 in the wall of the transverse chamber 35 adapted to be closed by a suitable screw or the like, and with its inner end engaging the inner end wall of the chamber 35.

At a proper distance from the door, the iioor 38 has secured thereto a socket 39 so located as tobe positively engaged by one of the locking members I9 when the door wings are swung into their open position, so that the wings can be locked in this position by the proper operation oi.' pin 24. In operation, the parts 28 and 3l being in the position illustrated in Figure 3, the spherical locking member I9, when engaging the socket 2u will recede into body I5 against the pressure of the spring 34 which will then press the ball I9 into the cavity of the socket. If it is desired to dog the latch I9 in this position, the pin 24 is operated to rotate member 28 to bring its tongues into the position shown in Figure 7 in which the ball latch I9 is held against inward movement into the body I5. When then the pin 24' is operated again to swing the member 28 into the position shown in Figure 3, the locking member I9 can recede into the cylindrical body I5 and the door may be opened and swung about its hinges into open position until the locking member I9 arrives at the socket 39 in the iioor to engage with its ball latch the same and to be locked in this position in the aforedescribed manner. The spring 36 will control the rotation of member 28 by frictional engagement of the door when the spring slides past opening 31 during the rotation of member 28.

It will be understood that we have described and shown the preferred form of our invention only as an example of the many possible ways to practically construct the same, and that we may make such changes in the general arrangement of the device and in the construction of the minor details thereof as come within the scope of the appended claims without departure from the spirit of our invention and the principle involved.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a door locking mechanism, a plurality of latches, each comprising a hollow cylindrical body embedded in the material of the door, a headed member having a reduced end rotatably held in said body, a pin secured tosaid headed member and extending from said body, tongues formed with said member at its reduced end, a. sleeve member in said body having marginal recesses adapted to be engaged by said tongues, spherical latch elements in said body partly projecting therefrom, a spring in said sleeve member, said spherical latch element held in locking position during .engagement of said members, and allowed to recede into said body upon their disengagement.

2. In a door locking mechanism, a plurality of latches, each comprising a hollow, substantially cylindrical metal body embedded in the material of the door, a solid headed member having a reduced lower end held in said body for rotation, a pin having a threaded inner tenon screwed into said headed member and extending from said body into a socket in the door, for rotating said member from the outside thereof, tongues formed from the material of the head and circumferentially surrounding the reduced end, a sleeve member in said body beneath said solid member and having recesses in its inner marginal edge adapt- 4' ed to receive the tongues of said solid member, a spring in said sleeve for holding said members in engagement, a spherical latch element held in the lower end of said body partly projecting therefrom to be pressed into its locking position 

